The Portugal resorts with the warmest sea water temperature in August are Madeira, Funchal and Canico.
Below you can see a list of all popular Portugal resorts and information about sea water temperature in August for the last two years.
| Resort Name | August 2026 | August 2025 | August 2024 |
|---|---|---|---|
| Madeira | 79.7°F | 78.0°F | 78.4°F |
| Funchal | 79.7°F | 78.0°F | 78.4°F |
| Canico | 79.5°F | 77.8°F | 77.9°F |
| Porto Santo Island | 78.7°F | 76.3°F | 77.6°F |
| Santa Maria Island | 77.6°F | 77.5°F | 81.2°F |
| Corvo Island | 77.3°F | 77.8°F | 81.0°F |
| Flores Island | 76.8°F | 77.7°F | 81.3°F |
| Sao Jorge | 76.8°F | 77.9°F | 81.0°F |
| Graciosa | 76.6°F | 78.2°F | 80.5°F |
| Pico Island | 76.4°F | 77.3°F | 80.2°F |
| Faial Island | 76.3°F | 77.2°F | 80.2°F |
| Terceira Island | 75.8°F | 77.0°F | 79.8°F |
| Sao Miguel | 75.6°F | 76.7°F | 79.9°F |
| Ponta Delgada | 75.1°F | 76.9°F | 80.1°F |
| Lisbon | 72.3°F | 72.4°F | 70.3°F |
| Tavira | 72.0°F | 76.5°F | 74.9°F |
| Setubal | 71.2°F | 70.4°F | 68.9°F |
| Faro | 70.9°F | 76.0°F | 74.8°F |
| Algarve | 70.9°F | 76.0°F | 74.8°F |
| Quarteira | 69.4°F | 75.0°F | 73.7°F |
| Porto | 69.3°F | 64.7°F | 62.4°F |
| Albufeira | 69.1°F | 74.8°F | 72.9°F |
| Peniche | 68.9°F | 66.2°F | 63.9°F |
| Portimao | 68.2°F | 74.0°F | 72.1°F |
| Ericeira | 67.9°F | 64.9°F | 62.3°F |
| Alvor | 67.6°F | 73.8°F | 71.6°F |
| Sintra | 67.4°F | 66.3°F | 63.7°F |
| Estoril | 67.1°F | 66.4°F | 63.6°F |
| Cascais | 66.9°F | 66.9°F | 64.0°F |
| Lagos | 66.5°F | 73.1°F | 69.9°F |
| Sagres | 65.3°F | 70.1°F | 65.4°F |
Please see following sea water temperature averages charts for the warmest Portugal resorts in August.
You can also get the same information for the every other month of the year when the average sea water temperature is greater then 70°F.
